### Attribute-Based Encryption with Key Cloning Protection

M. J. Hinek, S. Jiang, R. Safavi-Naini, and S. F. Shahandashti

##### Abstract

In this work, we consider the problem of key cloning in attribute-based encryption schemes. We introduce a new type of attribute-based encryption scheme, called token-based attribute-based encryption, that provides strong deterrence for key cloning, in the sense that delegation of keys reveals some personal information about the user. We formalize the security requirements for such a scheme in terms of indistinguishability of the ciphertexts and two new security requirements which we call uncloneability and privacy-preserving. We construct a privacy-preserving uncloneable token-based attribute-based encryption scheme based on Cheung and Newport's ciphertext-policy attribute-based encryption scheme and prove the scheme satisfies the above three security requirements. We discuss our results and show directions for future research.

Available format(s)
Category
Public-key cryptography
Publication info
Published elsewhere. Unknown where it was published
Keywords
Attribute-Based Encryption (ABE)Access ControlKey DelegationUser Revocation
Contact author(s)
mjhinek @ alumni uwaterloo ca
History
Short URL
https://ia.cr/2008/478

CC BY

BibTeX

@misc{cryptoeprint:2008/478,
author = {M.  J.  Hinek and S.  Jiang and R.  Safavi-Naini and S.  F.  Shahandashti},
title = {Attribute-Based Encryption with Key Cloning Protection},
howpublished = {Cryptology ePrint Archive, Paper 2008/478},
year = {2008},
note = {\url{https://eprint.iacr.org/2008/478}},
url = {https://eprint.iacr.org/2008/478}
}

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